Separator.



E.'M. STEWART L H. H. MCKENNAl SEPARATOR.

APPLICATION mio ocr. 10. |916.

Patented June 12, 1917.

venti on.

` blower 14.

UNITED s TATEs PATENT oEEIoE.

EDGAR M. STEWART, OF LANG, ANI) HUGH H; MCKENNA, OF LOS ANGELES, CALIFORNIA,

ASSIGNORS 01? ON E-THIRD' TO THOMAS THORXILDSEN, OF LOS ANGELES, CALI- FOBNIL.

Specication of Letters Patent.

SEPARATOR.

Angeles, in the county of Los Angeles and- State of California. have ii'nente'd a new and useful Improvement in Separatore7 of which the following is a specification.

The invention rlates to the art ot separating iinely divided materialsfrom a mix-- ture of said materials with hearier and coarser particles. Y

This is accomplished by a combination of suitable screens and a series of properl)y directed air currents.

The object of the invention is to provide a device into which a comminutedmaterial 1na \Y be dumped and in which the more' finely divided `portion of said material may be separated and delivered to suitable receptacles. It is especially valuable where the materialto be separated is `in theforin of fine dust adhering loosely to heavier particles.

Such a device linds'a iride application iu the arts and may lic applied to the lseparation of various materials. le have found it especially suitable for the separation of values from borax hearingA material after said material has heen dehydrated, and in thc description the treatment \Ve oli- \'iousl.\ do not lilnit ourselves' to an)r pai'- `tii-ular application oi our invention. which lua'v also he useil iu theY treatnn-ut of other materials or iu other arts.

In the. drawings. which are yfor illustrati ve purposes only z- Figure 1 aA side elevation of our in- Fig. 2 is a plan view of our invention. Fig. .3 is a cross section on a slightly enlarged scale through1 the center of ay portion of our invention.

Broadly considered, the apparatus illustrated consists of a receivinghopper 11, a separatori-,12, a waste bin 13. and a suction The receiving hopper 11 :is simply an open conical vessel having an openingy 15 at itsv lower end. Theblower 14 mas7 loe a centrifugal blower ofstandard I construction ldriven by any convenient means. The waste bin l13 consists of a. shell- 1G having an opening 17 at the top thereof, the shell 16 also serving asa support for the separator 12` A door 18 gives access to the interior of the bin 13 for the 1=emoval of Waste matter.

The separator 12 consists *of an outer shell having a central cylindrical portion 20, a conical top 21 and a conical bottom 22. Hand holes 23 are provided in the cover 21 which is secured to the hopper 11 and which is provided with an opening 24 regis tering with the olienng 15 of the hopper 11. The cylindrical portion is provided with a plurality of openings which may be partially or wholly closed by a riner damper 2G which slides in guides 27 and which may he turned to regulate the. amount ot air admitted through the openings 9.5L

Passingr through the bottom 22 is a draft tube 30. this tube having an opening 31 at-one end. which is connected directly into the suction side of the blower 14, and having Patented June 12, 1917.'

an opening 32 in the top thereof. The tube 30 is also provided with an air inlet portion 33 having openings 34 therein, these openings being wholly or partially closed ,by a ycap so that thetiow of air through the openings may be readily regulated.

Secured inside the cover f2.1 is a pri mar)v screen 40, this primary screen being oi' conical forni and concentrically located with relation to the corer 21. Secured in the top of the cylindrical portion 20 is an imperforate diversion cone 41, and secured to the lower edges vof the primary screen 40 is an imperforate cone 42 preferably formed of sheet metal. The cone 4'2 terniinates in a tube 4f.) which extends downwardlyr to a point slightly above the opening '31 'in' the draft tube 30. Se-

terial is dumped into the hopper 11, falling in a stream approximately as shown at 50, and striking upon a metal cone 51 which protects the upper end of the screen 40 from the impact of the' falling material, The mi teria] slides' 'down oizer ,the screen 40, as shown .at 51, and a portion of the finer perticles passes throu h the screen, partially due to the action, o revity, but mostl due to the suction of the lower 1/.l which raws air down through the hopper 11 es shown by the mfrow's 52, this air. eseingithrough the screen 40 and drawing the very line par ticles of material With itL The screen 40 'is Shaken by the impact of the material on the cone 51 and by the movementsof the"heevy particles thereover, softhat there is very little likelihood of it becoming clogged.

The materiel after passingil over the primary sereen 40 strikes upon i; e diversion cone 41 and is forced beek toward the axis of the separator, felling upon the secondary screen 4.4 near its upper, enr. In its passage over the secondary screen 44 there is e. urther separation of materieL due partially te gravity and partially to the uci-ien of the nir mu'rents which pass therethrough The terial fails from the sc'ieen 4v@ mito the eenira! bottom 22, dow' over and felling thro 'he pp the Weste bin'ln. ier previa for the purpose of allowing :my dust which is generntedfin the. bin lf3, er by the materiel ndts paissage-througli the bottom 22, to he drevy'n upwardly inte the interier of the screen chamber and outwardly through the blewer 14. 'Thesucfcessful operation of nur invenien dennd in a greet measure xipen the careful regulation of the ring' demper .26 and-the l @up 35; the-eieeti've suoi-ion of the pump heii'zgwreguluted by the Cup and the pro# port-innate admission of nir through the various Screen members being eontrelied by the ring damper 26.

"Ehe successful operation of nur `imreellen. further depends in u. large measure upon the tube 43 which tende be proprlf dire-et the .liiz currentsand p eddy mirri-mie side the sere-en ehembe'i In the use of our ix'ivention for the separe.- ton 4of boruX, the .'rrusl'ied materiel after he ing dehydrated, is vdmnped into thehop'hepil, 'passing through .the Separator as pre .cover-ed.

We claim as our invention z--M l. .A separator comprising A. cylindrical Shell 'with e conical top having an 'inlet open ing et the apex; n. eomcel primary screen fitting conmntrieaiiy ineide Suid. top; en mperfomte conical return member Secured to the bottom of said primary screen; an imperfor'ate diversion cone secured :it ite outer edge to the inner 'Walle el seid shell und eeucentrieelly. invented close te said returnneemY lf r; u secondary set/'een Secured to seid return member inside seid ei'ieil; menne for creating partial vacuum inside said gemene; und e Juive m4. iff'xx reju fi like amountof air admitted te ille puce surrounding Seid seconder) r, le seid shell.

' A ri-sing u eyirffiz' v. :5l i 'wing m inlet epen ing et the ape l from il prrmry s'fz'een litting Veorirentrielly inside said top; an imperforete conical return member .Seem-e5 lo the hot-terri .su-id primary screen; :in imperforate diversion. @one secured el its outer edge to the innerwelle of said shell and een ('.rfntricelly locuitei' close tu seid return mehr her; a eeeondery screen secured te seid return n1ern-berinside Suid shell; a tube se cured. to the lnittem of Suid return 1r und proyec-tingdownwardly to pe"- er creating:a ,a panini vacuum in serieus; and@ valve means for i* the ernennt of air admitted to tl" rfmzniiug Seid seemidery wreen inv shell.

testinmny whereof, We have hereieaue d eet@ our hands at Los Angeles, Califerni1 this Lil-h dey of (ktoher, 191.6. 

